Inertia is the tendency of an object to remain at rest or in motion. Newton's First Law of Motion states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force. The effects of inertia can be felt every day.
Over the Rainbow (often referred to as Somewhere over the Rainbow) is a ballad, with music by Harold Arlen and lyrics by Yip Harburg. It was written for the movie The Wizard of Oz (1939) and was sung by actress Judy Garland, in her starring role as Dorothy Gale. The song won the Academy Award for Best Original Song and became Garland's signature song, as well as one of the most enduring standards of the 20th century.
Harburg, in response to Gershwin's approval, quickly titled the new song Over the Rainbow and composed its lyrics. Judy Garland, who was cast to play the lead role of Dorothy, heard the song and loved it, but the other ears at M-G-M were not as impressed. Miss Garland has written, When I first met Harold I was just 14 years old and the first song of the score for The Wizard of Oz they played for me was Over the Rainbow. I was terribly impressed by Mr. Arlen's great genius and very much in awe of him.